Application of a Computer Algebra System for Constructing Newton Polygons for Ordinary Differential Equations

Abstract

Newton polygons corresponding to nonlinear ordinary differential equations of polynomial form help visually determine some properties of differential equations. In particular, the Newton polygons are used at finding asymptotic and exact solutions of nonlinear differential equations. In this report we present the algorithm of the ACNP (automatic construction of Newton polygons) program for the automatic construction of the Newton polygons corresponding to ordinary differential equations. The program has been written in Maple symbolic computing environment. The input to the program is a polynomial ordinary differential equation. The output is a set of points on the plane corresponding, according to a certain rule, to the monomials of the differential equation, the Newton polygon and the pole order of the solution for the differential equation. The application of the ACNP program has been demonstrated for studying the integrability property and for finding exact and asymptotic solutions of nonlinear differential equations.